1439309 has 2 divisors, whose sum is σ = 1439310. Its totient is φ = 1439308.

The previous prime is 1439293. The next prime is 1439323. The reversal of 1439309 is 9039341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1276900 + 162409 = 1130^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 1439309 - 2⁴ = 1439293 is a prime.

It is a super-2 number, since 2×1439309² = 4143220794962, which contains 22 as substring.

It is a Chen prime.

It is equal to p₁₀₉₈₈₃ and since 1439309 and 109883 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1439329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719654 + 719655.

It is an arithmetic number, because the mean of its divisors is an integer number (719655).

2^1439309 is an apocalyptic number.

It is an amenable number.

1439309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1439309 is an equidigital number, since it uses as much as digits as its factorization.

1439309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 1439309 is about 1199.7120487850. The cubic root of 1439309 is about 112.9062579120.

The spelling of 1439309 in words is "one million, four hundred thirty-nine thousand, three hundred nine".